{"id":60555,"date":"2024-10-13T03:50:25","date_gmt":"2024-10-12T19:50:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60555\/"},"modified":"2024-10-13T03:50:25","modified_gmt":"2024-10-12T19:50:25","slug":"db2%e5%bf%ab%e7%85%a7%e5%87%bd%e6%95%b8%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a2%ba%e7%90%86%e8%a7%a3%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60555\/","title":{"rendered":"DB2\u5feb\u7167\u51fd\u6578\u5982\u4f55\u6b63\u78ba\u7406\u89e3\uff1f"},"content":{"rendered":"<h1 id=\"db2%e5%bf%ab%e7%85%a7%e5%87%bd%e6%95%b8%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a2%ba%e7%90%86%e8%a7%a3%ef%bc%9f-GwjjPfbQkT\">DB2\u5feb\u7167\u51fd\u6578\u5982\u4f55\u6b63\u78ba\u7406\u89e3\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u5feb\u7167\u51fd\u6578\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u7279\u5225\u662f\u5728IBM\u7684DB2\u6578\u64da\u5eab\u4e2d\u3002\u5feb\u7167\u51fd\u6578\u5141\u8a31\u7528\u6236\u5728\u7279\u5b9a\u6642\u9593\u9ede\u6355\u6349\u6578\u64da\u7684\u72c0\u614b\uff0c\u9019\u5c0d\u65bc\u6578\u64da\u5206\u6790\u3001\u5831\u544a\u751f\u6210\u4ee5\u53ca\u6545\u969c\u6392\u9664\u7b49\u5834\u666f\u90fd\u975e\u5e38\u6709\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eDB2\u5feb\u7167\u51fd\u6578\u7684\u6b63\u78ba\u7406\u89e3\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afdb2%e5%bf%ab%e7%85%a7%e5%87%bd%e6%95%b8%ef%bc%9f-GwjjPfbQkT\">\u4ec0\u9ebc\u662fDB2\u5feb\u7167\u51fd\u6578\uff1f<\/h2>\n<p>DB2\u5feb\u7167\u51fd\u6578\u662f\u4e00\u7a2e\u7528\u65bc\u7372\u53d6\u6578\u64da\u5eab\u4e2d\u67d0\u4e00\u6642\u523b\u7684\u6578\u64da\u72c0\u614b\u7684\u5de5\u5177\u3002\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5728\u4e0d\u5f71\u97ff\u7576\u524d\u6578\u64da\u64cd\u4f5c\u7684\u60c5\u6cc1\u4e0b\uff0c\u7372\u53d6\u6578\u64da\u7684\u5feb\u7167\u3002\u9019\u5c0d\u65bc\u9700\u8981\u9032\u884c\u9577\u6642\u9593\u904b\u884c\u7684\u67e5\u8a62\u6216\u5831\u544a\u751f\u6210\u7279\u5225\u6709\u7528\uff0c\u56e0\u70ba\u5b83\u5011\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e5%bf%ab%e7%85%a7%e5%87%bd%e6%95%b8%e7%9a%84%e9%a1%9e%e5%9e%8b-GwjjPfbQkT\">\u5feb\u7167\u51fd\u6578\u7684\u985e\u578b<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u5feb\u7167\u51fd\u6578\u4e3b\u8981\u6709\u4ee5\u4e0b\u5e7e\u7a2e\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u6642\u9593\u6233\u5feb\u7167\uff1a<\/strong>\u9019\u7a2e\u5feb\u7167\u57fa\u65bc\u7279\u5b9a\u7684\u6642\u9593\u6233\uff0c\u5141\u8a31\u7528\u6236\u67e5\u770b\u5728\u8a72\u6642\u9593\u9ede\u7684\u6578\u64da\u72c0\u614b\u3002<\/li>\n<li><strong>\u7248\u672c\u5feb\u7167\uff1a<\/strong>\u9019\u7a2e\u5feb\u7167\u5141\u8a31\u7528\u6236\u67e5\u770b\u6578\u64da\u7684\u6b77\u53f2\u7248\u672c\uff0c\u5c0d\u65bc\u8ffd\u8e64\u6578\u64da\u8b8a\u66f4\u975e\u5e38\u6709\u7528\u3002<\/li>\n<li><strong>\u884c\u7d1a\u5feb\u7167\uff1a<\/strong>\u9019\u7a2e\u5feb\u7167\u91dd\u5c0d\u7279\u5b9a\u7684\u884c\u9032\u884c\u6355\u6349\uff0c\u9069\u5408\u9700\u8981\u7cbe\u78ba\u67e5\u8a62\u7684\u5834\u666f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8db2%e5%bf%ab%e7%85%a7%e5%87%bd%e6%95%b8-GwjjPfbQkT\">\u5982\u4f55\u4f7f\u7528DB2\u5feb\u7167\u51fd\u6578<\/h2>\n<p>\u4f7f\u7528DB2\u5feb\u7167\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT * FROM \u8868\u540d WHERE \u689d\u4ef6 FOR UPDATE WITH RS;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>FOR UPDATE WITH RS<\/code>\u8868\u793a\u5728\u5feb\u7167\u671f\u9593\uff0c\u8a72\u884c\u7684\u6578\u64da\u5c07\u88ab\u9396\u5b9a\uff0c\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u5c0d\u5176\u9032\u884c\u4fee\u6539\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u5feb\u7167\u671f\u9593\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-GwjjPfbQkT\">\u793a\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8868\uff0c\u4e26\u5e0c\u671b\u5728\u67d0\u4e00\u7279\u5b9a\u6642\u9593\u9ede\u7372\u53d6\u6240\u6709\u54e1\u5de5\u7684\u6578\u64da\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM employees FOR UPDATE WITH RS;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u5728\u5feb\u7167\u671f\u9593\u7372\u53d6\u6240\u6709\u54e1\u5de5\u7684\u6578\u64da\uff0c\u800c\u4e0d\u6703\u53d7\u5230\u5176\u4ed6\u4e8b\u52d9\u7684\u5f71\u97ff\u3002<\/p>\n<h2 id=\"%e5%bf%ab%e7%85%a7%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-GwjjPfbQkT\">\u5feb\u7167\u51fd\u6578\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>DB2\u5feb\u7167\u51fd\u6578\u7684\u61c9\u7528\u5834\u666f\u975e\u5e38\u5ee3\u6cdb\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u65bc\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5206\u6790\uff1a<\/strong>\u5728\u9032\u884c\u6578\u64da\u5206\u6790\u6642\uff0c\u5feb\u7167\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u5206\u6790\u5e2b\u7372\u53d6\u7279\u5b9a\u6642\u9593\u9ede\u7684\u6578\u64da\uff0c\u5f9e\u800c\u9032\u884c\u6e96\u78ba\u7684\u5206\u6790\u3002<\/li>\n<li><strong>\u5831\u544a\u751f\u6210\uff1a<\/strong>\u5728\u751f\u6210\u5831\u544a\u6642\uff0c\u4f7f\u7528\u5feb\u7167\u51fd\u6578\u53ef\u4ee5\u78ba\u4fdd\u5831\u544a\u4e2d\u7684\u6578\u64da\u5728\u751f\u6210\u6642\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<li><strong>\u6545\u969c\u6392\u9664\uff1a<\/strong>\u5728\u6545\u969c\u6392\u9664\u904e\u7a0b\u4e2d\uff0c\u5feb\u7167\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u6280\u8853\u4eba\u54e1\u67e5\u770b\u6545\u969c\u767c\u751f\u524d\u7684\u6578\u64da\u72c0\u614b\uff0c\u5f9e\u800c\u66f4\u5feb\u5730\u5b9a\u4f4d\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-GwjjPfbQkT\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528DB2\u5feb\u7167\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5feb\u7167\u51fd\u6578\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<li>\u78ba\u4fdd\u5728\u4f7f\u7528\u5feb\u7167\u51fd\u6578\u6642\uff0c\u4e86\u89e3\u6578\u64da\u7684\u4e00\u81f4\u6027\u9700\u6c42\uff0c\u4ee5\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u5feb\u7167\u7684\u6709\u6548\u6027\uff0c\u4ee5\u78ba\u4fdd\u5176\u80fd\u5920\u63d0\u4f9b\u6e96\u78ba\u7684\u6578\u64da\u72c0\u614b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-GwjjPfbQkT\">\u7e3d\u7d50<\/h2>\n<p>DB2\u5feb\u7167\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5728\u7279\u5b9a\u6642\u9593\u9ede\u6355\u6349\u6578\u64da\u7684\u72c0\u614b\u3002\u901a\u904e\u6b63\u78ba\u7406\u89e3\u548c\u4f7f\u7528\u9019\u4e9b\u51fd\u6578\uff0c\u7528\u6236\u53ef\u4ee5\u5728\u6578\u64da\u5206\u6790\u3001\u5831\u544a\u751f\u6210\u548c\u6545\u969c\u6392\u9664\u7b49\u65b9\u9762\u7372\u5f97\u66f4\u597d\u7684\u6548\u679c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u4ee5\u652f\u6301\u5176\u6578\u64da\u5eab\u7684\u904b\u884c\u548c\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3DB2\u5feb\u7167\u51fd\u6570\u7684\u6b63\u786e\u4f7f\u7528\u65b9\u6cd5\uff0c\u638c\u63e1\u6570\u636e\u5feb\u7167\u7684\u521b\u5efa\u4e0e\u7ba1\u7406\uff0c\u63d0\u9ad8\u6570\u636e\u5e93\u6027\u80fd\u4e0e\u6548\u7387\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60555","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60555","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60555"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60555\/revisions"}],"predecessor-version":[{"id":60556,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60555\/revisions\/60556"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60555"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60555"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}